Mr Costain has over 40 years of podiatry experience and is one of the co-founders of podiatric surgery, but for many years has specialised in gait evaluation techniques with the view of avoiding surgical intervention. He is the CEO of the Gait and Posture Centre in Harley Street, London, and divides his time between his private practice and expert witness work.

His expert witness work involves mainly cases involving personal injury or negligence to the feet, ankles and lower legs, where he considers the long term effect those injuries have upon mobility, gait and posture. These cases can arise from an injury sustained in the workplace, a road traffic or cycling accident, negligence in surgery, and many other causes. Where a patient has an injury that impacts their ability to walk, to be mobile, or has continued pain, he gets involved.

He has been involved in some criminal cases involving his expertise in gait analysis of CCTV footage and footprint analysis, but now concentrates more on personal injury expert witness work.

His podiatric analysis and reporting focuses on the dynamics of how the injuries change the patient’s gait and posture, creating pain and injury elsewhere, and the long term impact these injuries have on a patient’s daily life. The cases he sees often require the use of bespoke made specialised orthoses which can help to optimise foot leg and back function.

He has been regarded as a professional expert in his field since 1985 when he was first registered with the legal services commission. He holds full Expert Witness Institute insurance indemnity cover.

Examinations to be in my London consulting rooms.